This is an older version. v2 can be found on my profile. Hang up your headphones next to your table with this. Takes up 1 x 2 in. on top of the table, and has a lowered 1.5 x 2 in. arm to hang your headphones on. The arm itself is 0.5 in. thick in order to hold heftier headphones. This was designed for tables that are 1 and 3/8 in. (or 3.5 cm) thick, but can be easily adjusted in any 3D modeling program. If less than 1 and 3/8 in. thick, simply add a spacer between the bottom arm and underside of the table.